Patty designs an experiment to find out how much water is in an orange. She slices ten oranges, weighs each orange, then dehydrates the slices. When the slices are dry, she again weighs the slices that make up each orange. She puts her data in a table like the following: What data should go in the last column?
A. the difference in weight
B. the size of each orange
C. the number of slices
D. the total weight